[Linux-HA] Possible bug in Score calculation?
beekhof at gmail.com
Fri Dec 7 00:21:55 MST 2007
On Dec 7, 2007, at 7:47 AM, Dominik Klein wrote:
> Good morning Andrew
>>> sorry I have to bother again about score calculation but I came
>>> across something I don't understand and that might be a bug.
>>> I have a master-slave drbd resource called ms-drbd (primitive is
>>> called drbd2) and a group named testdb (4 primitives, "mount"
>>> being the first primitive).
>>> pingd multiplier is 300 (5 ping nodes)
>>> default-resource-stickiness is 200
>>> And these are my constraints:
>>> <rsc_order id="drbd2_before_testdb" from="testdb"
>>> action="start" to="ms-drbd2" to_action="promote"/>
>>> <rsc_colocation id="testdb_on_drbd2" to="ms-drbd2"
>>> to_role="master" from="testdb" score="300"/>
>>> When I look at the scores, I see
>>> drbd2:0 node1 0
>>> drbd2:0 node2 676
>>> This looks like the crm_master value from the drbd OCF RA plus
>>> stickiness times (number_of_group_items - 1).
>> that would make sense.
>>> How I come to think this has to do with the group? Because if I
>>> add another item to the group, the score increases by 1 x
>>> Guess this shouldn't be, should it?
>> it should.
>> the group needs to go with the master... so it makes sense that you
>> should take the groups location preferences into account when
>> deciding where to place and promote drbd
> Full ack on that, but I didn't configure it (at least not that I
> knew of - yet). So it's known and wanted to work this way. Sweet!
> Just curious: I suppose its my first constraint that does this job?
second - the colocation one
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